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http://www.smh.com.au/environment/rising-acid-levels-pose-growing-risk-to-marine-life-20100215-o2vj.html Rising acid levels pose growing risk to marine life February 16, 2010 *LONDON: *The oceans are becoming acidic at a faster rate than at any time in the past 65 million years, threatening marine life and food supplies, according to a new study. Researchers from the University of Bristol found that when ocean acidification accelerated, it caused extinction at the bottom of the food chain. The current acidification was being caused by carbon dioxide from cars and factories, which was absorbed by the water. Since the Industrial Revolution, acidity in the seas has increased by 30 per cent. The last time such a fast change occurred was thought to be 65 million years ago, when a natural event caused ocean acidification. The study looked at sediment from about 55 million years ago, when acidification was occurring. It found widespread extinction of tiny organisms. Andy Ridgwell, the lead author of the paper, published in *Nature Geoscience *, said acidification was occurring much faster today than in the past, ''exceeding the rate at which plankton can adapt'' and threatening the basis of much marine life. This would mean fish and other creatures further up the food chain that humans eat may be affected as soon as the end of this century, he said. *Telegraph, London* -- “Disobedience, in the eyes of anyone who has read history, is man's original virtue. It is through disobedience that progress has been made, through disobedience and through rebellion.” — Oscar Wilde, Soul of Man Under Socialism “The free market is perfectly natural... do you think I am some kind of dummy?” — Jarvis Cocker ________________________________________________ Send list submissions to: Marxism@lists.econ.utah.edu Set your options at: http://lists.econ.utah.edu/mailman/options/marxism/archive%40mail-archive.com
